Instruction book
3 Operating instructions
Safety precautions
The operator must apply all relevant safety precautions, including those mentioned in this book.
3.1 Initial start-up
If the compressor has not run for the past 6 months (at initial start-up check the date on the data plate), it
is strongly recommended to improve the lubrication of the compressor element: drain the oil, refill the
compressor with the same oil while turning the crankshaft.
It is strongly recommended to install an interstage drain kit, to remove excess condensate, on LT
compressors with a load factor less than 20% per hour. Consult Atlas Copco.
1. For Tank-mounted units, remove the transport brackets from underneath the compressor.
2. Check the electrical installation, which must be in accordance with the instructions given in section
2.3.
3.
LE/LT
are filled with PAO (polyalphaolefine) compressor oil. Check that the oil level is still near the
top of the red circle of sight-glass (SG-Fig. 1.3). Top up, if necessary.
4. Switch on the voltage. Start the motor.
5. On three-cylinder compressors, check for correct direction of rotation as indicated by the arrow on the
fan housing. If the rotation direction is wrong, switch off the voltage and reverse two of the input line
connections.
6. Check the operation of the air pressure switch. See section 5.4 or 5.5. Check the operation of pilot
valve (RV) on LE/LF/LT Trolley. See section 5.6.
3.2 Starting
LE/LF/LT
1.
On LE/LT
, check the oil level, which must be near the top of the red circle of sight-glass (SG-Fig. 1.3).
The minimum level is the lower part of the red circle.
2. Switch on the voltage.
3. Move switch (4-Fig. 5.6) to position
I
or push switch (S1-Fig. 2.26) to position
I
.
4. Open the air outlet valve (AV-Figs. 1.4/1.6).
5. Regularly drain condensate (Dm-Figs. 1.4/1.7).
LE/LF/LT Trolley with electrical motor
1.
On LE/LT
, check the oil level, which must be near the top of the red circle of sight-glass (SG-Fig. 1.3).
The minimum level is the lower part of the red circle.
2. Set pilot valve (RV-Fig. 1.12) in the unload position by turning the red handle 90 degrees (see section
5.6).
3. Attach the air lines to the air outlets.
4. Plug in and switch on the voltage at the main circuit breaker.
Warning
Never move the compressor after plugging in.
5. Move switch (4-Fig. 5.6) to position
I
or push switch (S1-Fig. 2.26) to position
I
.
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